Remove a deprecated wstring ToLower function.

chrome/browser/autocomplete/search_provider.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/search_provider.h"
 
 #include <algorithm>
 
 #include "app/l10n_util.h"
 #include "base/callback.h"
@@ skipping 698 matching lines @@
 
   // Search results don't look like URLs.
   match.transition =
       is_keyword ? PageTransition::KEYWORD : PageTransition::GENERATED;
 
   // Try to add |match| to |map|.  If a match for |query_string| is already in
   // |map|, replace it if |match| is more relevant.
   // NOTE: Keep this ToLower() call in sync with url_database.cc.
   const std::pair<MatchMap::iterator, bool> i = map->insert(
       std::pair<std::wstring, AutocompleteMatch>(
-      l10n_util::ToLower(query_string), match));
+      UTF16ToWide(l10n_util::ToLower(WideToUTF16(query_string))), match));
   // NOTE: We purposefully do a direct relevance comparison here instead of
   // using AutocompleteMatch::MoreRelevant(), so that we'll prefer "items added
   // first" rather than "items alphabetically first" when the scores are equal.
   // The only case this matters is when a user has results with the same score
   // that differ only by capitalization; because the history system returns
   // results sorted by recency, this means we'll pick the most recent such
   // result even if the precision of our relevance score is too low to
   // distinguish the two.
   if (!i.second && (match.relevance > i.first->second.relevance))
     i.first->second = match;
@@ skipping 25 matching lines @@
   if (input_.type() == AutocompleteInput::FORCED_QUERY)
     match.fill_into_edit.assign(L"?");
   match.fill_into_edit.append(
       AutocompleteInput::FormattedStringWithEquivalentMeaning(navigation.url,
                                                               match.contents));
   // TODO(pkasting): http://b/1112879 These should perhaps be
   // inline-autocompletable?
 
   return match;
 }